CONTENTS. 



CHAPTER XII. 



THE SELECTIVE INFLUENCE OF LIVING ORGANISMS 



ON ANIMALS 



PAG* 



Indirect Selection. Competition for Similar Conditions. Rela- 

 tions of the Pursued and the Pursuer. Transition Forms, in 

 Lamellicorn Beetles. Modifications leading to Physiological 

 Function. The Dorsal Eyes of Onchidium. Its Defensive 

 Glands. Protection by Imitation or Mimicry ; in Insects. 

 Difficulties with regard to Polyps and Fishes. New Instances 

 among Univalve Mollusca in the Philippines. False Mimicry 

 in a Worm in the Mediterranean. Caution as necessary as 

 Research 360 



NOTES ... . 407 



IXDEX ... ... 469 



